Q: After few days of sowing of maize seeds in the soil, irrespective of their position, the radicle always grows downwards, whereas the coleoptile always grows upwards. This phenomenon is known as:
(a)Phototropism
(b)Hydrotropism
(c)Chemotropism
(d)Geotropism
Correct Answer: (d)
The correct answer is (b): Hydrotropism. Subject: Geography | Sub-topic: Economic & Mineral Geography Note: This answer was determined through AI-based research. Verify against the official answer key when available.